WWW2020 online報告会

https://connpass.com/event/174856/

- Edge Formation In Social Networks To Nurture Content Creators
- OutfitNet: Fashion Outfit Recommendation with Attention-Based Multiple Instance Learning

Transcript

1. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   WWW 2020 ΦϯϥΠϯൃදձ
   April 30, 2020 - ؔࠜ ༟ਓ
   

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2. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   ࣗݾ঺հ
   ؔࠜ༟ਓ
   ɾ೥݄ʹ৽ଔೖࣾ
   ɾ8BOUFEMZ1FPQMFͷ%BUB$IBQUFSͱͯ͠+PJO
   ɾࣗવݴޠॲཧɺಛʹ-45.ʹΑΔݻ༗දݱநग़Λݚڀ
   

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3. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   1. Edge Formation In Social Networks To Nurture Content Creators
   2. OutfitNet: Fashion Outfit Recommendation with
   3. Graph Enhanced Representation Learning for News Recommendation
   ໨࣍
   

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4. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   &EHF'PSNBUJPO*O4PDJBM/FUXPSLT
   5P/VSUVSF$POUFOU$SFBUPST
   

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5. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   Creatorʹରͯ͠ϦΞΫγϣϯΛ͘Εͦ͏ͳਓʹର্͠ҐʹϥϯΩϯάͯ͠ϨίϝϯσʔγϣϯΛߦ͏͜ͱͰɺ
   ΫϦΤΠλʔ͕ΑΓcontentsΛੜΈग़ͯ͘͠ΕΔ؀ڥΛ࡞Δɻ
   → linkedinαʔϏεʹͱͬͯॏཁ
   ຊ࿦จWWW2020ൃදࢿྉ͔ΒҾ༻
   ͲΜͳ࿦จ
   

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6. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   ɾScoreؔ਺ΛCreatorͱConsumerʹ෼͚ͯఆٛ
   - Feedback Sensitivity
   - pResponse
   ɾCreatorͱConsumerʹ෼͚ͨ৔߹ͷΦϯϥΠϯA/B ςετͷ࣮ࢪํ๏
   ɾ৽ͨͳScoreؔ਺ʹΑΔCreator/Consumer΁ͷӨڹ
   ߩݙ
   

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7. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   4DPSJOHํ๏
   Scoreu,e
   ͕େ͖͍ͱuserʹentity͕ਪન͞ΕΔɻ
   user͕entityʹରͯ͠ߦ͏
   like, share, comments, clickͷಛ௃ྔ
   

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8. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   Q3FTQPOTF
   pResponseu,e
   ɾConsumer u͕Creator e΁FeedbackΛى֬͜͢཰
   ɾConsumerͱCreator͢΂ͯͷಛ௃ྔΛೖΕΔɻ
   Logistic regression modelͰֶश
   ɾlike΍comment͕༩͑ΒΕͨΒpositiveϥϕϧͱ͢Δɻ
   

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9. CONFIDENTIAL
   ©2020 Wantedly, Inc.
   'FFECBDL4FOTJUJWJUZ
   FeedBackΛड͚Δ਺͕ଟ͍΄ͲɺCreationΛߦ͏֬཰্͕͕Δɻ
   → FeedBackΛड͚ͨΒCreation͕৳ͼΔਓΛਪનͤ͞΍͘͢͢Δɻ
   ؍ଌҎ߱ʹҰͭͰ΋
   Creation͔ͨ͠ʁ
   

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10. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    ࣮ݧσʔλ
    LinkedinͷϦΞϧσʔλΛ༻͍ͯonline A/BςετΛ࣮ࢪ (Follow Recommendation)
    Dual A/Bςετ
    ɾConsumerͱCreatorͷೋͭʹର͠ɺTreatmentͱControlΛ෼͚Δ
    ɾTeͱCeɺTuͱCuΛͦΕͧΕଌΔ͜ͱͰɺTradeoffͷؔ܎Λௐ΂Δ
    

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11. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    $BOOJCBMJ[BUJPOFGGFDU
    Creatorʹ͓͍ͯɺTreatment܈(Value_creatorΛ଍ͨ͠΋ͷ)ͱControl(ͦΕҎ֎)܈Ͱ͸
    Treatmentͷํ͕ਪન͞Ε΍͘͢ͳͬͯ͠·͏ɻ
    

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12. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    ݁Ռ
    ɾFollowerʹରͯ͠͸ɺFollowΫϦοΫ਺΍ίϯςϯπ΁ͷinteraction͕ݮͬͯ͠·ͬͨɻ
    ɾContribute(share΍like, comment, messageͳͲ)Λߦ͏΋ͷ͕1.13%૿͑ͨɻ
    ɾMonthly Contributions͸9%૿Ճͨ͠ɻ
    ɾContributor͕૿͑ɺContents͕૿͑Δ͜ͱ͸Linkedinʹͱͬͯخ͍͜͠ͱͩɻ
    

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13. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    ٙ໰ɾײ૝
    ɾDual A/Bςετͷͱ͜ΖͰɺProducerͱViewerͷ෼͚ํ͕෼͔Βͳ͔ͬͨ
    - ͦ΋ͦ΋෼͚͍ͯΔͷ͔ʁ
    ɾFollowerͷFollow཰͕4%ۙ͘ݮͬͯ͠·͍ͬͯΔͷ͸େม?
    ɾOnline A/BςετΛͨ݁͠Ռɺ͔ͬ͠ΓͱContribution਺͕૿͍͑ͯΔͷ͸ૉ੖Β͍͠ɻ
    

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14. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    0VUGJU/FU
    'BTIJPO0VUGJU3FDPNNFOEBUJPOXJUI
    "UUFOUJPO#BTFE.VMUJQMF*OTUBODF-FBSOJOH
    

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15. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    ͲΜͳ࿦จ
    Fashion Recommendationʹ͓͍ͯΞΠςϜ୯ମͰਪનͯ͋͛͠ΔͷͰ͸ͳ͘ɺ
    Outfit(ίʔσΟωʔτ?)ͷ޷ΈΛֶश͠ɺͦͷ޷Έʹ͋ͬͨOutiftΛਪન͍ͨ͠ɻ
    1. OutfitΛ΋ͱʹΞΠςϜͷrelevancyΛֶशͤ͞Δ࢓૊Έ
    2. Ϣʔβʔͷ޷Έʹ͋ͬͨFashion outfitΛਪન
    Multiple instance learning (MIL)ͱͯ͠ղ͘ɻ
    ɾෳ਺ͷΞΠςϜʹରͯ͠Ұͭͷϥϕϧ͕͍͍ͭͯΔ໰୊
    ɾͲͷΞΠςϜ͕like/dislike͸ߟྀ͠ͳ͍
    

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16. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    'BTIJPO*UFN3FMFWBODZOFUXPSL '*3
    
    ϑΝογϣϯΞΠςϜؒͷؔ܎ੑͷຒΊࠐΈֶश
    S: outfitͷsubset
    x: itemͷrepresentation
    ɾ xi (positive) : S + {x}ؚ͕·ΕΔoutfit͕ଘࡏ͢Δ
    ɾ xj (negative) : S + {x}ؚ͕·ΕΔoutfit͕ଘࡏ͠ͳ͍
    ಉ͡outfitʹೖΓͦ͏ͳΞΠςϜಉ࢜ͷڑ཭͕
    ۙ͘ͳΔΑ͏ʹֶश
    Y@Jͱ4ͷSFMFWBODZTDPSF
    

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17. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    'BTIJPO*UFN3FMFWBODZOFUXPSL '*3
    
    ΞΠςϜͷrepresentationͷt-SNEʹΑΔՄࢹԽ
    ɾFIR: ಉ͡ܥ౷(taste)ͷΞΠςϜ͕
    ɹɹɹۙ͘ʹ഑ஔ͞ΕΔΑ͏ʹݟ͑Δɻ
    ɾDenseNet: Visual΍γϧΤοτʹґଘͯ͠
    ɹɹɹΞΠςϜ͕഑ஔ͞Ε͍ͯΔɻ
    

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18. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    0VUGJU1SFGFSFODFOFUXPSL 01
    
    Ϣʔβʔͷoutfit΁ͷڵຯΛଌΔωοτϫʔΫ
    '*3
    &NCFEEJOH
    "UUFOUJPOΛ༻͍ͯQPPMJOH
    

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19. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    1FSTPOBMJ[FE0VUGJU4DPSJOH
    Personalized Outfit ScoringͰ͸poolingͷࡍʹAttentionΛߦ͍ͬͯΔɻ
    VTFSͷSFQSFTFOUBUJPO
    GVTFE VTFSͱ
    JUFNΛ݁߹ͨ͠΋ͷ
    
    ͷSFQSFTFOUBUJPO
    

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20. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    "UUFOUJPOͷޮՌ
    Outfit 1Ͱ͸πͷ஋͸૯ͯ͡େ͖͍͕ɺOutfit 2, 3Ͱ͸খ͍͞ɻ
    Outfit 3ͷηʔλʔ͸πͷ஋͕େ͖͘ͳ͍ͬͯͯɺͦΕʹ൐ͬͯuser͕޲͚ΔAttention΋େ͖͘ͳ͍ͬͯΔɻ
    → ηʔλʔͷ৭ຯͱOutfit 1ͷ৭ຯ͕ࣅ͍ͯΔ͔Βೲಘ
    Outfit 1ͷΈUserͷ޷ΈͳOutfit
    

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21. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    'JMM*O5IF#MBOL '*5#
    λεΫ
    ͋ΔOutfitʹର͠ҰͭMaskΛ͠ɺϥϯμϜʹ3͖ͭ࣋ͬͯͯ4୒Λߦ͏ͱ͍͏λεΫɻ
    ɾFIRʹରͯ͠ͷλεΫ
    

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22. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    1FSTPOBMJ[FE0VUGJU1SFEJDUJPO
    Outfit iͱOutfit jʹରͯ͠ɺͲͪΒͷOutfit͕޷Έ͔Λ֤Ϣʔβʔʹରͯ͠ٻΊ͍ͯ͘ɻ
    

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23. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    σʔληοτʹର͢Δิ଍
    ຊ࿦จWWW2020ൃදࢿྉ͔ΒҾ༻
    

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24. CONFIDENTIAL
    ©2020 Wantedly, Inc.
    ·ͱΊɾײ૝
    • FIRʹΑͬͯΞΠςϜಉ࢜ͷؔ࿈ੑΛֶश͢Δ͜ͱ͕Ͱ͖ͨɻ
    • OPʹΑͬͯoutfit಺ͷΞΠςϜΛߟֶྀͯ͠श͢ΔϑϨʔϜϫʔΫΛ࡞Εͨɻ
    • FIRͱOPʹΑͬͯ fill-in-the-blank(FITB)taskͰ SOTAΛ֫ಘͰ͖ͨɻ
    • AttentionΛར༻ͯ͠Ϣʔβʔʹpersonalized͞ΕͨfashionΛ֫ಘͰ͖ͨɻ
    

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